Calculating machine



Jan. 28, 1941. R. MULLER 2,229,763

CALCULATING- MACHINE Filed Aug. 9, 1935 8 Sheets-Sheet 1 3 x I @Z;

ATTORNEYS INVENTOR Jan. 28, 1941. R L MULLER CALCULATING MACHINE FiledAug. 9, 1935 8 Sheets-Sheet 2 INVENTOR ROGlf hm/a fii 04m )%MMZQ 22 3 vI ATTORNEYS Jan. 28, 1941. R. L. MULLER CALCULATING MACHIHE Filed Aug.9, 1955 8 Sheets-Sheet 5 IIIIIIIIIII! INENTOR Hobs/'2 L. Muller TTORNEYSJan. 28, 1941. R. L. MULLER CALCULATING MACHINE Filed Aug. 9, 1935 8Sheets-Sheet 4 w r fi M m \VS a R O 0 m M I97 f O 22 r. n W 8 A g 32 DV: 0 B a zdw M44 Jan. 28, 1941. R. L. MULLER CALCULATING MACHINE FiledAug. 9, 1935 8 Sheets-Sheet 5 r e 1 MM 8 .VW m m N 0 n n N w A O Jan.28, 1941. R. L. MULLER CALCULATING MACHINE Filed Aug. 9, 1935 8Sheets-Sheet 6 Jan. 28, 1941. L MULLER CALCULATING KACHINE Filed Aug. 9,1935 8 Sheets-Sheet 7 III! II III II III INVENTOR R 01 er) mller Mm @wf"M M ATTORNEYfs Jan. 28, 1941. R. L. MULLER CALCULATING MACHINE FiledAug. 9, 1935 8 Sheets-Sheet 8 B d mwm 3 585 md m p z fiqawmm INVENTORfgbel fl jfulleh ATTORNEYS mum ago: mmko Patented Jan. 28, 1941 UNITEDSTATES PATENT OFFICE CALCULATING MACHINE Application August 9, 1935,Serial No. 35,433

5 Claims.

This invention relates to a calculating machine, and it is concernedparticularly with automatic controls for conditioning the machine fordifierent types of operation.

Calculating machines are usually conditioned for different operations bymeans of special keys, or levers, or by having a paper carriage actuatecertain parts to condition the machine automatically. One of thedifllculties with having the paper carriage actuate the controls is thatit places a load upon the carriage that interferes with its properoperation. For example, if there are no controls to be actuated inseveral columns of the carriage, the carriage will move freely andrapidly in these columns but, if, in other columns there are a number ofcontrols to be actuated, and this number varies, the carriage is loadedup in varying amounts and will move slowly, or sluggishly, orerratically. The present invention has been devised to overcome thisdifllculty.

The general object of the invention is to provide an improved automaticcontrol for conditioning a calculating machine for different operations.

More specifically, the object of the invention is to provide a machinein which a function indexing means is automatically set after which thismeans is sensed by a means that conditions the machine for the desiredoperation.

A further and more particular object is to provide improved controls forgoverning the movement of the paper carriage of a calculating machine.

Other objects and advantages of the invention will appear from thefollowing specification and drawings.

An embodiment of the invention is shown in the accompanying drawings, inwhich;

Fig. 1 is a right side elevation of a machine with the invention appliedthereto, certain parts being cut away to show others more cleariy, andwith the parts in normal position;

Fig. 2 is a left side elevation, some of the parts being cut away toshow others more clearly,

' and the parts being shown in normal position;

Fig. 3 is a rear elevation showing particularly the manner in which thepaper carriage is controlled and some of the parts that are set by saidcarriage;

Fig. 4 is a detail right side sectional elevation of certain portions ofthe machine at the lower rear side, the view showing particularly theindexing means in the position it occupies before the motor bar has beendepressed;

Fig. 5 is a view similar to Fig. 4 showing the parts in the positionthey occupy after the motor bar has been depressed but before themachine has operated Fig. 6 is a view similar to Fig. 5, except that theparts are shown in the position they occupy at the extreme end of aforward stroke of machine operation and just after the printingmechanism has operated;

Fig. 7 is a left side elevation and section certain of the controls,taken near the rear of the machine, the view showing the parts in theposition they occupy after the motor bar has been depressed but beforethe machine has started to operate;

Fig. 8 is a perspective view showing particularly the tabulatingmechanism associated with the paper carriage;

Fig. 9 is a view of the carriage return mechanism, the view being takenfrom the front and showing the manner in which this return mechanism isused with the present invention; and

Fig. 10 is a perspective view of certain portions of the indexing andsensing means.

Fig. 11 is a view showing a sample of one form of work that may beperformed with the invention.

The invention is shown applied to a Burroughs calculating machine of atype that is Well known so that a detailed description is not necessary.It will be understood that the invention can also be used with othertypes of machines.

General machine construction The machine is provided with a plurality ofdepressible amount keys i6 (Fig. 1) upon which items may be enteredafter which the machine can be operated by depressing a motor bar I Ithat causes a motor 2 to give the machine a cycle of operation whichincludes a forward and a return stroke. During this cycle, the machineperforms certain functions depending upon how it is conditioned.

The amount keys control the position of actuator racks l3 which meshwith large gears It, with which a main register i5 and two multipleregisters 55 and H are adapted to cooperate.

A printing mechanism including the type bars (8 is operated near the endof the forward stroke in the cycle of machine operation to print theitems entered or the calculation performed.

The machine is provided with a platen P about which paper may be held inprinting position relative to the printing mechanism. Provision is alsomade for causing printing to occur in different columns on the paper.This is accomlittle load upon the carriage.

plished by supporting the platen on a travelling paper carriage 20controlled by a tabulating mechanism of which portions are shown in Fig.8 and which will be described in more detail later. This tabulatingmechanism is normally operated during the latter part of each cycle ofoperation of the machine to release the carriage for movement to thenext column under the urge of a spring 2i (Fig. 3). The carriage can bereturned automatically by power through a carriage return mechanism 22of the type described in Rinsche Patent No. 1,580,534.

Function indexing means Instead of having the paper carriage conditionthe machine to perform difierent functions, the carriage merely indexesan indexing means which is relatively light and which places very Thismakes possible a lighter and faster moving carriage and one that may bestarted and stopped quickly in either direction. Also, the load on thecarriage remains the same for all its movements.

The indexing means is in the,i'orm of a rotatable drum 30 (Fig. 2)mounted upon a shaft 36 carrying a worm wheel 32 meshing with a worm 33fixed to a shaft 36. Fixed to the end of shaft 34 is a gear 35 thatmeshes with a rack 38 (Fig. 3) fixed to the paper carriage. It will thusbe seen that the drum 3t rotates as the carriage is moved, and occupiesvarious indexed positions, or stations, depending upon the columnarposition of the carriage.

The indexing drum has a series of cross members til (Fig. 3) to whichare detachably connected a series of indexing, or abutment, stops oiwhich five are shown on the cross bar illus-- trated in Figs. 3 and 10,numbered Qt, ll, 62,

.43 and 44. These stops are of various lengths accordance with theconditioning of. the machine for columnar printing, after which theindexing means is sensed by a means which, in the form or the inventiondisclosed, is a mechanical feeling mechanism.

Sensing means As mentioned, the machine is conditioned to performdifierent iunctionsloy having a mechanism feel, or sense, the indexingmeans. The

term function as used herein, is not intended to include onlycalculating functions such as addition or subtraction, but alsofunctions such as repeat operations of the machine, skip-tab operations,control of the printing mechanism, and similar functions.

For the purpose of sensing the indexin means, a series of verticallymovable members, or links, are provided, five being shown in the presentembodiment of the invention and numbered N, W, 48, 49 and 50, as shownin Figs. 3 and 10. These sensing members are guided at their lower endsby a plate 58 (fig. 2) and, at

their upper ends, are connected to arms 52 oiwhich there is one for eachof the members. The arms 52 are pivoted on a stationary shaft 53 ne r te rear of the machine. Those sensing members are normally held inelevated position by means of a shaft, or bail, 55 that engages theundersides of the arms. The shaft 55 is-carried by side arms 56 pivotedon the shaft 53 and a spring 57 serves to urge the bail in a. clockwisedirec tion as infewed in Fig. 2. Also, springs 58, of which there is oneattached to each of the arms 52, serve to urge the arms in a clockwisedirection so that, not only the controlling ball 55 but also the arms 52with the sensing members 46-50 are urged clockwise to a feeling or"sensing position.

The ball 55 is held upward by means of a lever til (Fig. i) pivoted on ashaft iii, The rear end of this lever is positioned under the ball 55and its forward end is connected to a downwardly extending link 62 whoselower end has a slot 63 in which is positioned a stud IE6 carried by alever (55 pivoted 611 a stationary stud $5. The lever 65 is urgedcounterclockwise as viewed in Fig. 4 by a relatively strong spring 62connected to it by plates lit, but it is normally held against movementby the engagement of a stud ill on the lever with the edge of a cam llfixed to a shaft 62 that is rotated one revolution during each cycle ofoperation of the machine. Pivotally connected to the stud 64 on thelever 65 is a second link 73 whose upper end has a stud and slotconnection M with the link 62. The link is carries a latch urgedcounterclockwise as viewed in Fig. i by a spring it to cause a lug illon the latch to engage over a shoulder it on the link t2.

With the parts in the position of Fig. 4, the ball 55 tends to urge thelever Gt) clockwise, which tends to pull the link t2 upward, but thelatter cannot move upward because it is held by the latch '55 carried bythe link l3 connected to the lever 65 that is held against upwardmovement by the relatively strong spring Bl. Accordingly, in thisposition of the parts, which is the normal position, the bail 55 is heldupward and the feeling or sensing members 66-58 remain ele vated ininactive position.

The bail 55 is released, in the embodiment of the invention shown, as anincident to the conditioning of the machine for a cycle of operation bymeans of the motor bar it.

Referring to Fig. l, the motor bar M is connected to the pivoted leverstil and M in the usual manner so that the lever til is rockedcounterclockwise as viewed in Fig. when the motor bar is depressed.Movement of this lever, acting through spring t2, tends to raise thelong motor control link 81'? that controls the clutch 84 and causesthemotor to give the machine a cycle of operation. The rear end of lever 3ihas a stud and slot connection with an arm 85 fixed to a shaft 86. Theshaft 86 extends across the machine and, near the center of the machine,another arm dl is fixed to it. The latter is pivotally connected to adownwardly extending link 88 whose lower end (Fig. 4) is connectedthrough a spring 89 to one arm til of a bell crank lever pivoted at iii.The other arm 92 of this bell crank lever is connected to a link 93provided with a bent end positioned in front of a stud 95 carried by apass-by pawl 95 pivoted on the latch "l5 and urged counterclockwise by aspring 96.

till

shoulder I8 on the link 52. When this occurs, the link 62 is free tomove upward. This means that the lever 60 is free to rock clockwise andthat the bail 55 can move downward under the urge of its spring. The netresult is that, when the motor bar is depressed, the bail 55 movesdownward and the feeling members 46-50 move to their sensing positions.The position of the parts after the motor bar has been depressed butbefore the cycle of machine operation has started is shown in Fig. 5.

It is desirable to have the members 46-50 sense the indexing meansbefore the machine starts to operate and, since these members arereleased by depression of the motor bar, provision is made forpreventing depression of the motor bar from causing a cycle of machineoperation until the sensing members have moved to sensing position andconditioned the machine. Referring to Fig. l, a latch lever I is pivotedadjacent the motor control link 83, the latch lever being urgedcounterclockwise as viewed in Fig. 1 by a spring II, but being held inthe position of Fig. 1 by a cam lever I02 that engages a stud I03 on theupper end of the latch lever. The lower end of the latch lever ispositioned to engage a shoulder on the link to prevent upward movementof said link to cause a cycle of machine operation until the latch leverI00 is rocked counterclockwise from its Fig. 1 position. The cam leverI02 is fixed to a shaft I04 to which is also fixed an arm I05 connectedto one end of a link I06 whose lower end is connected to a bell cranklever I01 urged counterclockwise as shown in Fig. 1, by a spring I08.

The rear arm of the bell crank lever I0! is positioned under the bail 55that controls the sensing members 46-50 inclusive. When the bail 55 ismoved downwardly, it rocks the bell crank I0I clockwise against thetension of spring I08 and moves the cam lever I02 to release the leverI00, for movement to released position under the urge of its spring.This releases the motor control link 83 and its spring 82 then moves itupwardly to cause the machine to be given a cycle of operation. But,since this cannot happen until the bail 55 moves downward, which actionreleases the sensing members 45-50 the cycle of machine operation doesnot occur until the sensing members have moved to condition the machine.

The mechanism above described is returned to normal position during acycle of operation of the machine as follows: Referring to Fig. 4, theshaft 12 is given a complete revolution during each machine cycle. Thisshaft corresponds to the shaft in Rinsche 1,580,534 to which the crank48 of said patent'is attached. This shaft makes a. complete revolutionat about the rate of 200 strokes per minute whereas the machine, owingto the spring connections with the drive and thespring return strokeoperates at the rate of about 125 strokes per minute. .During theforward stroke of the machine, a raised portion of cam II. engages thestud I0 on lever 65 and rocks the lever to the position of Fig. 6. As itmoves to this position, the link' I3 is moved upwardly which moves thelatch I5 upward and moves the stud 94 out of the control of the link 93.The latch I5 then moves counterclockwise under the urge of its springand the lug on said latch moves over the shoulder I8 on the link 52. Themovement of the lever 55 by cam ll retensions the spring 81, and whenthe stud moves oil? of the high portion of the cam, the spring tends topull the link I3 downward. Since this link is now latched to the link62, the latter tends to move downward which would rock the lever 60counterclockwise as viewed in Fig. 6 and raise the bail 55 to raise thesensing members 46-50 to normal. But it is not desired to have thesensing members 46-50 moved upward so early in the cycle of machineoperation, owing to the fact that they control certain other parts thatwill be presently described. Accordingly, a latch H0 is provided (Fig.6) which is urged counterclockwise by a spring III so that when the linkI3 is moved upward to its Fig. 6 position, the latch I I0 automaticallymoves over a stud II2 on the link and latches the link in Fig. 6position. The latch is released during the return stroke of the machineby a pass-by pawl II3 carried by a sector II4 on a shaft II5 that isfirst rocked clockwise from the position ofFig. 4 to that of Fig. 6 andthen returned counterclockwise to normal. The shaft I I 5 is the shaftordinarily known as the 800 shaft in the Burroughs machine, the samebeing so numbered in the patent to Burroughs 504,963. During thecounterclockwise movement, that is, during the return stroke of themachine, the pawl I I3 engages a stud M6 on the latch H0 and moves thelatter to release link I3 whereupon the links I3 and 62 are moveddownwardly and the bail 55 is restored to normal to restore the sensingmembers 46-50 to normal. When the bail 55 is restored to normal, thebell crank I01 (Fig. 1) is released whereupon its spring I08 rocks itcounterclockwise and restores the cam lever I02 to the position of Fig.l to thereby restore the latch lever I00 to active position.

In this manner, the function indexing means is sensed automaticallyprior to an operation of the machine; the machine is conditioned toperform predetermined functions depending upon the columnar position ofthe carriage and the arrangement of the indexing stops on the drum 30;the machine is operated; and, during the cycle of operation, the sensingmeans is restored to normal to free the indexing means to permit it tomove easily when the carriage moves to the next column. Variousfunctions may be controlled but, in order that the operation ofautomatic conditioning the machine may be clear, five illustrativefunctions will now be described.

Control of main register Controls are shown for conditioning the mainregister, sometimes called the crossfooter, for addition, subtraction,or non-add.

Referring to Figs. 2 and I, a four-armed lever I is pivoted at I2I. Itsupper arm, to which the reference numeral I20 has been applied, isconnected to the lower end of a manually controllable lever I22 pivotedat I23. This lever has three positions. Its central position is anon-add position; its rear position shown in full lines in Fig. 2 is anadd position; and its forward position, shown in dot-dash lines in Fig.2, is a subtract position. The lever is urged counterclockwise as viewedin Fig. 2 by a spring I24 connected to four-armed lever I20, whichspring thus tends to move the parts to add position.

The forward arm I25 of the four-armed lever I20 (Fig. 7) is connectedto" a suitable mechanism I26, whichhas not been shown in detail, forcontrolling the main register I5 with respect to its non-add, add andsubtract operations. a

The rear arm. in of the four-armed lever 120 is positioned under a studI120 carried by the sensing member 50 which extends upward and is bentslightly forward for the purpose. When the sensing member 66 movesdownwardly under the urge of its spring 58, the four-armed leveri2I--I20 is rocked counterclockwisey as viewed in Fig. 7, to a positionthat depends upon the length of the indexing stop 30 that is in activeposition at the time. If a long indexing stop is in position, thefour-armed lever will remain in add position. If an intermediate stop isin active position, the sensing member will move down slightly and thefour-armed lever will be moved to "non-add position. If a short stop 40is in active position, the sensing member will move down a considerabledistance to move the four-armed lever Mil-[I20 to "subtract position.The lever is also limited in its subtract position by a stud i20 thatcontacts the edge of lever I20 (Fig. 7).

The four-armed lever is releasably held in any of its three positions bya detent E30 urged counterclockwise by a spring [135 to hold a stud I32on the detent in engagement with one of several notches in the bottomedge of the arm I33 of the four-armed lever i520.

During a cycle of machine operation, the fourarmed lever I20 is lockedagainst movement until after the machine operation has been com: pleted.This is accomplished by means of the latch I35 (Fig. '7) movable intoengagement with notches I36 in a sector I31 forming a part of the reararm I21 of the'four-armed lever I20. The latch bail I35 is pivotedloosely on a shaft I38 and urged counterclockwise as viewed in Fig. 7 bya spring I39 connected at one end with a projection from one arm of thelatch bail. The latch has a downwardly extending arm I40 carrying a studwhich is positioned to be engaged by an arm I4I fixed to a shaft I42.The shaft I42 has another arm I43 fixed to it, which is controlled by ashaft I44, the latter being carried by arms I45 fixed to a shaft I46that is rocked during a cycle of operation of the machine. This shaft iswhat is ordinarily known as the 100 shaft in the Burroughs machine, thesame being so numbered in the patent to Burroughs 504,963, and numberedas shaft 4'7 in Rinsche 1,580,534. The arrangement is such that, duringthe first part of a machine cycle, the shaft I44 is rockedcounterclockwise from the position of Fig. 7 and then returned clockwiseduring the latter part of the cycle. This results in rocking the arm I Hclockwise at the beginning of a machine cycle to permit the latch I35 tomove into engagement with one of the notches I36 where it remains untilnear the end of a machine cycle, whereupon the arm I is rockedcounterclockwise and the latch retracted from the notch.

Regardless of the position to which the fourarmed lever I20 is moved, nomatter whether manually or automatically, it is always returned tonormal "add position at the end of a machine operation.

During each machine operation, a stud I50 (Fig. 7) carried by an arm Ithat first rocks counterclockwise and then returns clockwise with shaftII5, engages the detent I30 and releases it. At the same time the armI5I moves away from a stud I52 on a latch I53 pivoted on shaft I2I andurged clockwise by spring I54. As the detent I30 is moved to releasedposition, the latch I53 snaps over a lug I65 on the detent and holds itin released position until near the end of the cycle of machineoperation, that is, until after the locking latch E35 has been released,the sensing member 46 restored to normal, and the four-armed lever I 20thus released so that it together with the manual lever I22 can bereturned to add position by spring I24. After these events haveoccurred, the arm I5I engages the stud I52 and releases the latch I53 topermit the detent I30 to move to normal to hold the four-armed lever inadd position.

To summarize the action of the controls for the main register, they arenormally in add position but may be manually conditioned for subtractionor non-adding by means of a lever I22. The controls are held momentarilyin the position to which they are moved by a detent I30 and, then,during the cycle of machine operation, are locked against movement. Nearthe end of the cycle of operation, the lock is released and, before thedetent I30 becomes operative, the controls are automatically returned toadd condition.

The controls are automatically conditioned for subtraction or non-addingby the sensing member 46 that moves the four-armed lever I20 to thedesired position where it is temporarily detained by the detent I30.Then, during the cycle of machine operation, the four-armed lever islocked in position and, near the end of the cycle, the sensing member isrestored to normal, the lock released, and the controls returned tonormal add" condition.

Control of multiple registers The registers I6 and H are controlled inmuch the same way as the main register.

A four-arm lever I60 (Fig. '7) is provided for the register I6 and asimilar lever I6I controls register I'I. Each can be positioned bymanual levers I62 and I63 respectively which, however, are movable onlyto an add and non-add position, no provision being made for subtraction.

A separate .detent, such as the detent I30 is provided for each of thefour-armed levers I60 and I6I and these detents operate in the same wayas detent I30 except that the detent I30 for the main register isprovided with a stud I64 extending under the detents for the registersI6 and I1, so that when the machine is operated and the detent I 30 ismoved clockwise to its released position where it is latched, the twodetents for registers l6 and H are likewise moved and held. Thefour-armed levers I60 and I6I are locked against movement by the lockinglatch I36 in the same manner as the four-armed lever I20 for the mainregister is locked.

The four-arm levers I60 and I6I are automatically controlled by thesensing members 41 and 48 respectively (Fig. 3) in the same manner asthe mainregister. The construction is slightly diflerent for theregisters I6 and IT, in that the sensing members 41 and 48 carry studsI66 and I65 (Fig. that engage over the rearwardly projecting ends oflevers I61 and I68, respectively, pivoted at I69. The other ends ofthese levers are positioned to engage studs "0 and III on the four-armedlevers I6I and I60 respectively.

The controls for the registers I6 and H are urged to non-add positionrather than add position because, while it is generally desired to additems in the main register during each cycl'of operation of the machine,it is not usually desirable to employ the multiple registers exceptincertain operations.

The four-arm levers I50 and Iii for the registers I6 and H are urged tonon-add position by means of. scissors devices (Fig. 'I) of which thereis one for each lever. Each comprises two members I12 and I13 pivoted.on shaft I38 and straddling studs I'M or I15, as the case may be,carried by the respective four-arm levers IGI- and IE0. The two scissorsmembers I12 and I13 are urged into engagement with their sds by springsI16.

Normally, each pair of scissors arms straddles a fixed stud I'Il on theframe of the machine. When one of the four-arm levers IE or ISI moves toadd position, it is rocked clockwise and the stud H or ill moves itsrespective scissors member I13 counterclockwise against the tension ofSpring I16. During a machine operation when the detent-for thefour-armed member is released and, after the locking latch I35 has beenreleased, the four-armed member is restored to its non-add position bythe spring urge on the scissors arm I13. The arm H2 will, of course,restore the four-armed member to normal when said member is moved in theopposite direction as is necessary in totaling operations which,however, will not be described.

Tabulating mechanism-Early release of carridge Provision is made forcausing the carriage to tabulate from one column to the other at anearlier point in the cycle of machine operation than is ordinarily thecase.

The tabulating mechanism is operated by a cam 50 (Fig. 7) fixed to themain operating shaft MB of the machine. This cam rocks a lever It! whoserear end extends through the back plate of the machine where it has afork and stud connection I82 with a slide I83. The arrangement is suchthat, during a cycle of machine operation, the slide I83 is first moveddownwardly (Fig. 8) and then returned upward. This operates the linespacing mechanism (not shown in detail) to line space the platen duringcertain oi the machine operations depending upon how the line spacingcontrol is conditioned. The paper carriage supports a tabulating bar 485(Fig. 3) carrying a plurality of tab stops I85, the bar being rockablymounted on the paper carriage and spring urged to the position shown inFig. 8. In the different columnar positlons of the carriage, therespective tab stops I85 abut against a block or abutment I90 (Fig. 8)which arrests the carriage in a columnar position corresponding to thestop, the carriage tending to move to the right in Fig. 8. As themachine is given a cycle of operation the'tabulating bar carrying thetab-stop I85 is usually rocked to move the active tab stop above theabutment let, whereupon the carriage moves to the next column, thearrangement being such that the succeeding tab stop I85 strikes theabutment I'9I) to arrest the carriage in the next column.

In the present case, instead of rocking the tabulating bar, the abutmentis moved. Referring to Fig. -8, the slide I83 is provided with a pawl582 having a shouldered end I93 engaging over a lug I94 on the abutmentI90. The latter is pivoted at I95 and spring urged clockwise by a springI96.

With this construction, as the machine starts to operate, the slide I83moves downward and above described is concerned, the carriage is re-vleased for movement at the beginning of a cycle or machine operation.However. it is not desired to have the carriage move at this time andmeans is provided for temporarily looking it in position.

Referring to Fig. 7, the lower rail 200 of the paper carriage is slottedat 2M to receive the lower edge of a pawl 202 pivoted at 203 and urgedclockwise by a spring 204 connected at one end to the stationary bracket205. The pawl is normally prevented from moving by a stud 206 carried bya rearwardly extending portion 201 of one of the arms 56 that supportthe bail 55 heretofore described. As long as the ball 55 is in itsuppernormal position, the pawl 202 is held inactive by stud 206 as shownin Fig. 2. It will be recalled, however, that, when the motor car isdepressed, the bail 55 is released and it movesdownwardly before themachine starts to operate.

When it moves, the stud 2G6 moves upward and.

releases the pawl 2&2 which is thereupon moved by its sprin 2% intoengagement with the carriage, as shown in Fig. 7, to hold the latteragainst movement. The carriage is thus lore vented from moving to thenext column, even though the tabulating mechanism has released it asabove described. I

Referring to Figs. 4, 5, and 6, it will be recalled that the bail 55remains in its lower position during the first half of a cycle ofmachine operationand that, during this part of the cycle, the link, orslide, i3 is moved upward and latched in the position of Fig. 6. Also,that during the early part of the return stroke of the machine, theslide 13 is released and the release of this slide causes the bail 55 tobe restored to normal. The restoration of bail 55 to normal causes thestud 206 (Fig. 7) to cam the latch 202 out of engagement with the papercarriage and the late ter is thereupon released to move to its nextcolumnar position. This release occurs early in the return stroke of themachine to give the carriage enough time to move to its next column bythe time the cycle of machine operation has been completed.

The printing mechanism operates near the end of the forward stroke of amachine and. hence the carriage is not released for movement until afterthe printing mechanism has operated.

As the tabulating pawl i92 (Fig. 8) moves downwardly, during the forwardstroke of the machine, a stud 2") on the pawl engages a cam 25! (Fig. 3)which is prevented from rocking clockwise in 3 by a stud. This camcauses the pawl I92 to be pushed clockwise (Fig. 8) to move the shoulder593 away from lug R94 to thereby release the abutment 90 which isthereupon freed to move back to normal under the urge of its spring 396.But the abutment does not return to normal until after the carriagestarts to move to its next column because, when it was first releasedfrom the active tab stop 85, it moved to the left slightly (Fig. 8) soas to be under the active tab stop, which thus temporarily prevents itsreturn. This lateral movement of the abutment is due to the fact thatthe abutment is carried by a stud 2i2 (Fig. 8) supported on a slide 2I3.This slide is connected to the lower end of a lever 2 (Fig. 3) pivotedat 265 and urged clockwise by a spring 2". The other end of lever 2 isconnected to a dash pot 2". When a carriage tab stop strikes abutmentI90, the latter moves to the right slightly (Fig. 8) and the dash potcushions the action, the spring 2H6 being tensioned. When the abutmentis pulled down by the slide 583, as above explained, the spring 2H3moves the slide M3 to the left and moves the abutment under the activetab stop.

Control of tebulating mechanism for skip tabulation In addition tocontrolling various calculating functions of the machine, such as abovedescribed, another function of the machine that may be automaticallycontrolled is the tabulation of the carriage, that is, columnarprinting.

The conditioning of the tabulating mechanism is controlled by thesensing member 4d (Figs. 3 and 10). The rear end-of the arm 52 to whichthe sensing member 49 is connected extends under one arm of a bell crank222 best shown in Fig. 3. This bell crank is connected to a link 223which is slidable on a stud 22d and provided with a downwardly extendingprojection 225 adapted to engage a slide 225 which is similar to theslide 92 shown in Muller Patent No. l,9a2,2l6. Referring to Fig. 8, theslide 226 is yieldingly connected by a spring 2211 to another slide 228having a cam end 229 adapted to engage a cam notch in the abutment H0.The arrangement is such that when slide 228 is moved to the right inFig. 8, it earns the abutment B downward out of the path of the tabstops. When the slide 226 is moved to the right in Fig. 8, it is latchedin this position by a latch 23d that engages over a stud 23f! in slide226. This latch may be released by an extra long tab stop ltd-L (Fig. 8)which engages a pass-by pawl 232 on latch 230 and moves it to releasedposition.

When the sensing member 69 is moved down it rocks bell crank 222clockwise in Fig. 3 which moves link 223 and slide 226- the right. Thissets the skip-tab mechanism as above explained.

From the above. it will be clear that when the sensing member 49 isallowed to move downward by the indexing means in a predetermined columnof the carriage, the tabulating mechanism will be conditioned to skip apredetermined number of columns, the return of the tabulating mechanismto normal depending upon the location of the long tab stop ltd-=1.

Automatic control of repeat machine operations Another function, oroperation, of the machine that is automatically CODtlOllGdJS the numberof cycles through which the machine will go without any attention on thepart of the operator.

These repeat machine operations are con.- trolled by the sensing member519 (Fig. 4) which is connected at its upper end to an arm 2% fixed to ashaft 24! pivotally supported on the back plate of the machine. Thisshaft has another arm 242 fixed to it and extending upwardly as shownmost clearly in Fig. l. The arm 242 has a stud 243 on its upper endpositioned over one end of the lever 24d fixed to a shaft 245. Anotherarm 246 is fixed to the shaft 246 and the upper end of arm 246 has ayielding connection through spring 241 with a slide 248, said spring 241also serving to urge arm 246 counterclock= wise. The slide 248 is urgedto the left, as shown in Fig. v1, by spring 2471. The spring 24? isconnected to a lug projecting from the upper edge 01' the slide 248 andto an extension of lever 246 were above the stud entering the slot inslide 248 so that the spring urges the lever 246 clockwise which urgesthe slide 248 forwardly. This slide controls the repeat operations ofthe machine in a manner which is described in detail in Patent No. 1,97,774 and which will be only briefly described here.

When the slide 246 is moved to the right as viewed in Fig. 1, it ispositioned under a stud 250 on an arm 25! which is thereby preventedfrom rocking to its full extent in a clockwise direction. The limitedmovement of the arm. 25! prevents a pas-by pawl 252 on its end fromacting on a stud 253 on the end of a pivoted lever 254 which is normallyrocked near the end 0! a cycle of operation of the machine to releasedepressed keys and engage a slide 255 to release the motor bar which hasbeen latched by a latch 256. When the pass-by pawl 252 is prevented fromacting as just mentioned, the keys will not be released and the motorbar will remain de-= pressed to cause the machine to take another cycleof operation.

In positions of the indexing means where the sensing member 50 is notallowed to move downward, the repeat slide 248 remains in the positionof Fig. 1 and the machine is conditioned to be given only a single cycleof operation. If, however, in a predetermined column, the sensing member50 is allowed to drop, the arms 24!?) It will be recalled that the motorcontrol link 83 is normally latched against movement by the lever latcheon (Fig. l), and this latch is returned to normal at the end of eachcycle of machine operation. Means must be provided to disable this latchfor repeat operations. Reierring to Fig. 4, it will be recalled that thelatch 715 is controlled by the link 93 which, in turn, is moved by thebell crank 90-92. When the link $8 is moved upwardly from the positionof Fig. 4, the bell crank 80-92 is moved to release latch l5 whereuponthe ball 55 moves down and this releases certain parts that release thelatch lever which moves out oi the path of link to. When the ball 55 isrestored to normal during the machine cycle, the latch EBB is restoredto normal to block link Referring to Fig. l the bell-crank lever 963-92carries a pass-by pawl 26%? adapted to be engaged by one arm 268 of ayoke 262 pivoted at 2%. "This yoke has another arm 28% engaging a shaft265 carried by arms 268 fixed to one of the main drive shafm I46 of themachine. The shaft M6 is first rocked clockwise from the position ofFig. 4 and then returned counterclockwise during a cycle of machineopemtion. The yoke 2% is normally prevented from moving by means of alatch 266 having a lateral lug 269 engaging over a projection .219 onthe yoke the latch being urged counterclockwise as viewed in Fig. l by aspring 2' During a normal operation of the ma chine, as the shaft I46rocks clockwise, the shaft 266 moves away from the arm 2613, but theyoke 262 does not move because it is held by the latch 26'. However,when the machine is conditioned for repeat operations, it will berecalled that the sensing member W is moved downwardly which rocks theshaft 241 counterclockwise. Thisshaft carries a projection 213 adaptedto engage a stud 2' on the latch. 268 in such a way that, when thesensing member 50 moves downwardly, the latch 268 is moved to a positionto release yoke 262. Accordingly, during that cycle of machineoperation, the yoke 262 will be rocked counterclockwise by its spring215. During this movement, the arm 26l will pass the pass-by pawl 260but, during the return movement of the yoke, caused by the returnmovement of shaft 265, the arm 264 will engage the pass-by pawl 260 androck the bell crank 90--82 clockwise to enable it to move to a positionto grasp latch 15. The bell crank 9092 can be rocked clockwise by arm26! even though link 88 is held upward by the latched-down motor bar.This is due to the stud and slot connection between said bell crank andthelink 88. When said bell crank is rocked by the arm 26!, the action isonly momentary, after which arm 26! passes over pawl 200 and releasesthe bell crank, whereupon the spring 89, which was tensioned by theclockwise rocking of bell crank 3092, rocks said bell crankcounterclockwise, thereby pulling the link 93 to the right (Fig. 4) andreleasing the latch 15. This permits bail 55 to move down a second timeto release the sensing members. In other words, near the end of themachine cycle, the general operating means of the machine, that is, themain shaft I46 with its arm 266, causes a release of the bail 55 toenable the sensing members to move to sensing position again and todisable latch I00 for the motor control link 83 so that the latter maymove upward to cause a repeat operation of the machine.

It is not desired under any circumstances to cause a repeat operation ofthe machine until after the paper carriage has reached the columnintended for such operation. An interlock has been provided to preventthis.

Referring to Fig. 3, the machine is provided, as previously explained,with a dash pot cushion 2ll for the tabulating mechanism as described indetail in Muller Patent No. 1,942,216. When one of the tab stops I85strikes the abutment I90, the latter is moved to the right as viewed inFig. 3 against the cushioning action of the dash pot above mentioned.When the abutment is disengaged from the active tab stop, the spring 2H5(Fig. 3) which is connected to lever 2 that, in turn, is connected tothe link 213 (Fig. 8) which carries the abutment, moves the abutment tothe left in Fig.8.

The link 2 I3 is provided with an extension 280 (Fig. 8) which engagesthe upper end of a pawl 28| pivoted at 282 and urged counterclockwise bya spring 283. The lower end of this pawl is adapted to move over the endof one armof the bell crank 30-92 (Fig. 4) that controls the release ofthe latch 15 which controls the release of bail 55 that controls therelease of the latch I00 for the motor control link 83.

When a tab stop is against the abutment I90, the pawl 28! is rockedclockwise out of alignment with the lever 80, but, when the abutment isreleased of the tab stop, the link 2l3 moves to the left and swings thepawl 28| counterclockwise. The pawl cannot move over the leverimmediately because the lever is still in its upward position, but thepawl moves against the side of the lever ready for action. As soon asthe lever is moved downwardly, as it is during the latter part ofthecycle of machine operation, the pawl 28! moves over the lever toprevent upward movement of it to release the latch 15 until the carriagereaches the column it is to occupy whereupon the tab stop engages theabutment I90 and the movement of the latter to the right (Fig. 8) swingsthe pawl 28| clockwise out of position, thereby releasing the lever 90which immediately moves to release the latch I5, thereby releasing themotor control link to permit it to give the machine a second cycle ofoperation.

From the descriptions just given, it will, therefore, be apparent thatthe repeat machine operations can be controlled automatically in thesame manner as other functions of the machine through its sensing member50, suitable interlocks and controls being provided to insure that theoperation will take place properly.

Special control of carriage When the machine is conditioned for andoperated to perform a certain sample of work to be presently described,the paper carriage is caused to return automatically after a repeatoperation of the machine.

Referring to Fig. 1, the machine is provided with a special motor bar300. One arm of a bell crank 30| pivotally carried on the stem 29'! ofthe special motor bar 300 has a slotted end engaging a stud 293 on thelever 80 with which the regular motor bar is connected. The other arm ofthe bell crank 30l cooperates with a fixed stud 302. When the main motorbar is depressed alone, the lower arm of the bell crank 30! is rocked toa position over the stud 302 and prevents subsequent depression of thespecial motor bar 300 while the regular motor bar remains depressed.When the special motor bar 300 is depressed, a hook 238 on the stem ofsaid motor bar engaging over the stud 299 causes the regular motor baralso to be depressed and latched down by the latch 250. The lower arm ofthe bell crank simultaneously moves down behind the stud 302 and, incooperation with said stud, holds the special motor bar 300 down whilethe regular motor bar H remains down. The stem of the special motor baris connected to one arm of a bell crank 303 urged clockwise as viewed inFig. 1 by a spring 304. The other arm of this bell crank is positionedover a stud 305 on one arm of a three-arm member 308 pivoted at 301 andurged clockwise by a spring 308. The upper arm of this three-arm membercontacts a stud 303 on a plate 3I0 connected to the drive shaft 3 whichis first rocked counterclockwise from the position of Fig. 1 during amachine cycle and then returned clockwise. The lower arm of thethree-arm member 306 carries a stud 312 adapted to cooperate with apass-by pawl Ill pivoted on one arm of a pivoted bell crank lever 3 [4.

When the special bar 300 is depressed, the bell crank 303 is rockedcounterclockwise which frees the stud 305 and allows the three-armmember 306 to move clockwise under the urge of its spring 308 as thestud 309 is rocked counterclockwise during the machine cycle. Duringthis movement of the three-armed lever, the stud 3|! passes the pawl3I3. Upon the return or counterclockwise movement of the three-armedlever 306, caused by the engagement of the stud 300 with it, the stud3l2 engages the pass-by pawl M3 and rocks the bell crank 3H clockwise.

The bell crank 3 is connected at its lower end to a link 3l5 which, inturn, is connected to an arm 318 fixed to a shaft 3". This shaft carrlesanother arm 3l8 connected to one end of a lever 3E9 pivoted at 323. Therear end of this lever is connected to a link 32!! which, when the bellcrank 3% is moved clockwise as above explained, is pulled downwardly.

Referring to Fig. 9, when the link 32H is pulled downward, it moves aslide 322 downward which releases a pivoted latch 323. Latch 323releases a slide 324 which is thereupon moved upwardly by a spring 325to rock a lever 326 clockwise about its pivot 32! to throw in thecarriage return clutch 328. The carriage return mechanism is thusautomatically conditioned during the return stroke of the machine toreturn the carriage toward its original position. This return movementcontinues until a cam 336 on the carriage engages a stud 33l on theslide 326 and moves it downwardly to rock the lever 326 counterclockwise to disengage the carriage return clutch.

Accordingly, if, at any time, the operator depresses the special motorbar 306, the paper carriage will be automatically returned toward normaland stopped in a predetermined column depending upon the location of thecam 333.

When the special motor bar 303 is depressed while the paper carriage isin a columnar position where it conditions the machine for an automaticrepeat operation the above described parts are conditioned differentlythan above stated. It will be remembered that the carriage conditionsthe machine for an automatic repeat cycle by rocking the lever 246(Fig. 1) clockwise. Connected to the lower end of this lever is a link340 which, in turn, is connected to a pivoted latch 34I having a laterallug on its end adapted to move under the upper arm of the three-armedlever 306.

Thus, if the special motor bar 300 is depressed while the carriage is ina columnar position where it conditions the machine for an automaticrepeat operation following the cycle initiated while the carriage is insaid position, the return mechanism is disabled and remains disabled aslong as the machine remains in automatic repeat cycle condition.However, when the carriage comes to rest in the column where the lastautomatic repeat cycle is to be performed, that is, a columnar positionimmediately preceding one where a cycle must be initiated manually, thelever 246 and slide 248 return to normal and the carriage returnmechanism will operate automatically at the end of said automatic repeatcycle of the machine.

Accordingly, even though the special motor bar 300 is depressed in theNo. I column, the three-armed lever 306 cannot rock clockwise under theurge of its spring 308 and the carriage return mechanism is notconditioned for operation. In the No. I column, the machine is alsoconditioned to automatically skip to the No. 3 column and, since therepeat mechanism is conditioned for operation in No. I column, thecarriage will move to its No. 3 column after the cycle in column No. I,and the machine will then be automatically given a cycle of operation incolumn 3. In this column, the repeat mechanism is not conditioned foroperation, and hence the above-mentioned special control of the carriagereturn mechanism becomes operative so that, after the repeat operationin the N0. 3 column, the carriage is automatically returned to the No. 2column. In the latter column the repeat mechanism is not active but theskip tab mechanism is. The machine is given a cycle in column 2 bydepressing the regular motor bar and, after the cycle, the machine stopsand the carriage tabulates to its No. Al column, column 3 being skipped.An adjustment of a long stop l85L such that it will cause the carriageto be arrested in column 3 when it skips from column l to column 3but-not when it tabulates after an operation in column 2 is obtainableby virtue of the movement which the abutment E90 is permitted before itarrests the carriage after it has been engaged by a tab stop 685. Saidlong stop l85L can be so positioned that when the carriage is at rest incolumn 2 said long stop will be to the right of the latchpawl 232 asviewed in Fig. 2, but it will operate on the pawl 232 to trip the latchjust too late to arrest the carriage in column 2 but quite early enoughto arrest the carriage in column 3 when the carriage moves from column Bwith the skip-tab mechanism in skipping condition.

Normalizing features It is possible to normalize both the tabulatingmechanism and the repeat mechanism together, or to normalize the repeatmechanism separately.

Referring to Fig. 1, a normalizing key 350 is mounted on the keyboard,the key being latched in the usual manner after being depressed. Thestem 35I of this key is slidably mounted on a stud 352 and the stem hasa rear projection 353 carrying a stud 354 which, when the keyisdepressed, rocks a pivoted lever 355 (Fig. 3) clockwise. The center ofthis lever is connected to a link 356 which has a bent end 35'! (Fig. 8)that disables the tabulating pawl I92. In other words, when thenormalizing key 350 is depressed, the tabulatlng pawl I92 is disabled sothat the tabulating mechanism will not be operated during a cycle ofmachine operation.

The stem 35I of the normalizing key also has a forward projection 360adapted to engage a stud 36I on a lever 362 pivoted on the stud 352. Therear end of this lever carries a stud 363 adapted to engage the arm 244connected to the shaft 245 that controls the repeat lever or arm 246.When the normalizing key 350 is depressed, the leyer 362 is rockedcounterclockwise, which rocks the repeat lever 246 counterclockwise, orprevents clockwise movement of it, so that repeat machine operations areprevented.

When it is desired to normalize the repeat mechanism only, anothernormalizing key 310 is depressed, this key being also latched afterbeing depressed. The lower endof the stem of this Sample of work Asample of work of which the machine is capable is shown in Fig. 11. Forthis work the machine is conditioned and functions as follows:

In the No. I columnar position of the carriage, the special motor bar300 depressed. The sensing member for the main register is allowedto.move downward, upon downward movement of the regular motor bar, tonon-add the main regist r, The sensing members for the multiple essenceregisters do not move and these registers remain in "non-add condition.The sensing member for the tabulating mechanism is allowed to movedownward to condition the tabulating mechanism to cause the carriage toskip the No. 2 column. The sensing member for repeat machine operationsis allowed to move down to condition the machine for repeat operations.The machine is given a cycle of operation during which the item that isentered on the amount keys is printed but not entered in any 01 theregisters. During the latter part of this cycle, the carriageautomatically moves to its No. 3 column, column No. 2 being skipped.

When the carriage arrives at its No. 3 column. it is automatically givena cycle of operation owins to the fact that the repeat machine mechanismhas been conditioned as lust explained. This cycle does not start,however, until after the carriage has reached this position, owing tothe interlock previously described. In this position of the carriage,the sensing member-"for the main register is allowed to move tocondition the latter for subtraction so that the item is subtracted fromthis register, and the sensing members for the multiple registers areallowed to move to the "add position so that the item is added in eachof the latter registers. The repeat machine operation sensing member isnot moved, with the result that a third operation of the machine willnot take place. Accordingly, during this second cycle of operation, theitem will be subtracted from the main register, it will be added in eachoi the multiple registers, and, at the end of the operation, thecarriage will be automatically returned to its No. 2 column, a cam m(Fig. 9) being provided to arrest the carriage in this position.

The machine then stops, whereupon the operator makes another entry onthe amount keys, after which he depresses the regular motor bar. In thisposition of the carriage, the sensing member tor the main register isallowed to move to non-add the latter and the sensing members for themultiple registers do not move so that no addition occurs in either ofthem. The sensing member controlling the tahulating mechanism isconditioned to cause the carriage to skip the No. 3 column. At the endoi the cycle oi-operation. the carriage automatically moves in its No. 4column. The sensing member for the repeat operations is allowed to movein column 2 and then continues to move in columns 0 and I so that themachine operates automatically in columns 4, Q and I, after which it isautomatically returned to the right, viewing the machine from the front,and machine operations stop. In columns 4 and I all the registers arenon-added,

while in column i all of them in "add condition.

The above operations are particularly useful in connection with certaintypes of public utility billing where certain of the items are to berepeated, but it is to be understood that the machine can be conditionedfor many other types or work by varying the controls heretoforedescribed.

It is to be understood that the construction shown is for purposes ofillustration only and that variations may be made in it withoutdeparting irom the spirit and scope oi the invention as defined by theappended claims. The claims on the broad subject matter 01' the sensingtype of automatic controls have been transferred to my copendingapplication Serial No. 51,263, flied No vember 23, 1935.

I claim:

1. A machine of the class described havin means for giving it cycles ofoperation, a traveling paper carriage, a tabulating mechanism forcontrolling the columnar positioning of said car- 'riage, means foroperating said tabulating mechanism to cause it to release said carriageearly in a cycle of operation of said machine, holding means other thansaid tabulating mechanism for holding said carriage against movementwhen so released, function conditioning means for said machine movable.to active position and restorable to normal, means for restoring saidfunction conditioning means to normal later during the cycle of machineoperation, and means operated by said restoring means for moving saidcarriage holding means to release said carriage at the time saidtunction'conditioning means is restored to normal.

2. A calculating machine of the class described having calculatingmechanism, means for giving said machine cycles of operation, atraveling paper carriage normally movable from column to column acrossthe machine as an incident to each machine cycle, a tabulating mechanismcontrolling said movements of said carriage, function-indexing meansindexed automatically in accordance with the position of said carriage,a plurality of function-controlling devices normally out 01'engagementwith said indexing means but automatically movable intoengagement there- .with sumciently prior to operation of the calculatingmechanism of said machine to control the functions of said machineduring the machine cycle, means for operating said tabulating mechanismto release said paper carriage for movement early in the machine cycle,holding means operated automatically as said function-controllingdevices are moved into engagement with said indexing means totemporarily hold said carriage against movement, and means operatingduring said machine cycle to restore said function-controlling devicesto their normal position out of engagement with said indexing means andto also release said carriage holding means to thereby enable saidcarriage to move to its next position without interference irom saidfunction-controlling devices.

3. A calculating machine of the class described having means for givingit cycles of operation, a paper carriage normally movable in onedirection from one columnar position to the next adjacent position as anincident to each machine cycle, carriage-return means for returning saidcarriage in the opposite direction, control means operable inpredetermined positions of said carriage, means conditioned by operationof said control means for causing said carriage return meansautomatically to return the carriage in the opposite direction duringthe machine cycle.eftected after operation oi. said control means, repeat means automatically conditioned in at least one of saidpredetermined carriage positions to cause said cycling means to give themachine an automatic cycle when the carriage reaches a subsequentcolumnar position and'to hold said control means, when operated in thesaid predetermined carriage position, in operated condition until saidautomatic cycle is eflected, and means rendered effective by saidrepeatmeans, when the latter is so conditioned, to prevent operation or saidcarriage return means until said automatic cycle is performed in saidsubsequent carriage position.

4. A calculating machine of the class described having means for givingit cycles of operation, a travelling paper carriage, tabulatingmechanism normally controlling said carriage to cause it to move fromone column to the next adjacent column during the latter part of amachine cycle, indexing means indexed in accordance with the columnarpositions of said carriage, skip-tab mechanism for conditioning saidtabulating mechanism to cause said carriage to skip predeterminedcolumns, sensing means operable to sense said indexing means, and meansfor causing said sensing means to sense said indexing means at thebeginning of a machine cycle to condition said skip-ta mechanism toenable said carriage, when the tabulating mechanism operates, to skip toa predetermined column in the latter part of said machine cycle. I

5. A calculating machine of the class described having means for givingit cycles of operation, a travelling paper carriage, tabulating mecha--nism normally controlling said carriage to cause it to move fromone'column to the next adjacent column during the latter part of amachine cycle, indexing means indexed automatically in accordance withthe columnar positions of said carriage, a skip-tab mechanism forconditioning said tabulating mechanism to cause said carriage to skippredetermined columns, sensing means adapted to be moved into sensingengagement with said indexing means, means for causing said sensingmeans to sense said indexing means for a given machine cycle tocondition said skiptab mechanism to release said carriage for movement,and holding means conditioned automatically as said sensing means ismoved to sensing position to temporarily hold said carriage againstmovement, said holding means being automatically released as saidsensing means is moved out of sensing engagement with said indexingmeans to thereby enable said carriage to skip to a predetermined column.

ROBERT L. MULLER.

